Demountable rim



0 V. NACHAND AND E. M. RAHM.

DEMOUNTABLE RIM.

APPLICATION FILED OCT- 14, 1920- Patented Ju1y"19, 1921.

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DEMOUNTABLE RIM.

APPLICATION FILED "OE'T. I4, I920.

Patented July 19 1921.

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A TTORNEY5 tJNlTED STATES PATENT OFFICE.

DEMOUN'TABLE RIM.

assure.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed October 14, 1920. Serial No. 416,873.

- in a Demountable Rim, of which the followin is a specification. I

he object of our invention is to provide a demountable rim of relatively simple construction which can be readily attached and detached; and to provide the novel combination and arrangement of parts hereafter described and illustrated in the accompanyin drawings, in which:

Figure 1 is a side elevation of the invention applied to an automobile wheel with parts broken away and in section;

Fig. 2 is a transverse sectlon, partly in elevation;

Fi 3 is a detail perspective view, with mom or 11 shown in dotted lines;

Fig. 1 is a longitudinal section through the portion of the rim in which member 11 is mounted;

. Fig. 5 is an elevational view of the portion of the rim where the sections are divided, one of the sections being shown in a dotted line position to indicate the method of removing and applying that section.

Fig. 6 is a perspective view of member 8; and

. Fig. 7 is a perspective view of member 11.

Like numerals indicate like parts in each of the several views.

Referring to the accompanying drawings, We rovide a rim 1 having spaced arcuate locking recesses 2 so shaped as to encompass and grip locking lugs 17 in the folly 18.

lVe preferably divide the felly band into twenty equal arts at 19 of which are provided the locking lugs 17, while at the twentieth is provided the transverse angularly disposed slot 3 which is adapted to receive the cam 11 having the angularly disposed slot 12 adapted to receive the lug 14 which is welded on the telly band 21, preferably in the center thereof. lVe provide a suitable valve opening 4 in rim 1, and a suitably elongated valve opening 19 in felly 18, whereby to permit of longitudinal movementof the rim 1 and valve 22 relative to the felly 18. Rim 1 is made in sections which are connected by a suitable hinge 5, and releasably engaged at the opposite contacting edges of said sections, as shown in Fig. 1, by the \l-shaped projections 6 which releasably engage in corresponding V- shaped recesses 6, one on either side of the r m, as shown in Fi 5. One of the sections is moved out o engagement with the other in the manner shown in dotted lines in Fig. 5 when the device is to be demounted. lVe provide a suitable cam screw socket 8, adapted to receive the cam screw 9 which is inserted through opening 13 in extension 10 of cam member 11. We further provide a suitable nut 15 and washer 16 to engage the threaded end of cam screw socket 8, as illustrated in Fig. 2. We provide in rim 1, as shown in Fig. 5, an additional V-shaped recess 20 through which the projections 6 on that side of the rim maly be passed in demounting the rim.

. 11 use the cam 11 with its'angularly disposed slot 12 which engages the 111 14 on the felly band 21 causes longitudina movement of the rim 1 by reason of a wedging action and securely locks the rim in assembled position. The cam 11 and cam screw 9 are not removed from the wheel to mount or remove the rim. The locking ring in its outeredge is crimped inward or toward the center of the Wheel a sufficient amount to hold the rim in a fixed position when the rim is locked in place. On one end of the section ofthe rim 1, as indicated in Fig. 1, is formed the sectional hinge 5 integral with the rim. The sections of rim interlock and are held in place by a suitable fast pin, the entire hin e being designated as 5 1n the drawing. %he opposite joints of the sections of rim 1 are held in perfect alinement while under the pressure of an inflated tire. Upon deflation the lock formed by the engagement of projection 6 in recesses 7 loses its property of locking and alinement, thereby allowing the rim to be easily unlocked and removed from the tire in the manner indicated in Fig. 5 of the drawings. The edges of the transverse slot 3 in which cam member 11 seats are disposed at an angle from the axis of the rim to correspond with the disposition of the cam member 11 required.

What we claim is 1. In a device of the class described, the combination of a rim having spaced arcuate locking recesses extending part way into the inner surface of the rim from one side thereof, a felly having similarly spaced locking lugs positioned to releasably engage slotted portion in the rim, whereby to I mit of readily securing the rim in p and readily detachin same.

2. In. a demoufitab e rim of the class described, the combination of a rim having spaced arcuate locking recesses, a felly havin similarly spaeed locking engageab e in the aforesaid recesses, the rim having an angularly depressed'groove, a slotted cam or wedge member engagin in sa1d groove, a felly band having a pro ection en gaging in the slotted portion 0 the cam member, and means integral with the afore-:

said cam member for moving it and fasten-. 20

ing it on the side of the rim.

CLYDE v. NACHAND. EDWIN M.-RAHM. 

